CN112636404A - Storage battery system for railway vehicle - Google Patents
Storage battery system for railway vehicle Download PDFInfo
- Publication number
- CN112636404A CN112636404A CN201910952182.5A CN201910952182A CN112636404A CN 112636404 A CN112636404 A CN 112636404A CN 201910952182 A CN201910952182 A CN 201910952182A CN 112636404 A CN112636404 A CN 112636404A
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- China
- Prior art keywords
- battery
- rail vehicle
- storage battery
- battery system
- voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
Abstract
The application discloses rail vehicle is with battery system includes: a storage battery configured to store electric energy when charged and supply power to the rail vehicle when discharged; a charger configured to charge the storage battery; a DCDC module configured to communicate the battery with a rail vehicle when the battery is discharged; when the storage battery is charged, the charging voltage output by the charger is adjusted; and disconnecting the primary circuit to isolate the battery when the battery fails.
Description
Technical Field
The application relates to the field of energy sources, in particular to a storage battery system for a railway vehicle.
Background
When the traditional railway vehicle storage battery system works in a charger, the closed contactor generates large current impact, arcing and sparking phenomena easily occur when the contactor is broken down and broken, and overcharging of the battery can be caused, so that the battery is damaged.
Disclosure of Invention
In view of the above, the present application aims to provide a rail vehicle battery system that is safe and reliable and can protect a battery.
In view of the above object, the present application provides a rail vehicle battery system, comprising:
a storage battery configured to store electric energy when charged and supply power to the rail vehicle when discharged;
a charger configured to charge the storage battery;
a DCDC module configured to communicate the battery with a rail vehicle when the battery is discharged; when the storage battery is charged, the charging voltage output by the charger is adjusted; and disconnecting the primary circuit to isolate the battery when the battery fails.
In some embodiments, further comprising:
and the monitoring module is configured to monitor the state of the storage battery, acquire state information, upload the state information and control the DCDC module to regulate the charging voltage output by the charger.
In some embodiments, the DCDC module comprises:
and the IGBT switching tube is configured to regulate the input voltage and the input current of the storage battery by controlling the on-off ratio through a duty ratio.
In some embodiments, the monitoring module is specifically configured to:
and collecting the output voltage of the charger, outputting PWM (pulse-width modulation) pulses according to the output voltage, and controlling the duty ratio of the IGBT switch tube to carry out PID (proportion integration differentiation) closed-loop control on the charging voltage.
In some embodiments, the monitoring module further comprises one or more of: the device comprises a single battery voltage acquisition circuit, a battery current acquisition channel, a temperature signal acquisition circuit, an RS485 communication interface, a high-speed CAN interface and a CPU chip.
In some embodiments, the RS485 communication interface is configured to communicate with a rail vehicle display to upload the status information.
In some embodiments, the high-speed CAN interface is configured to interface with a PC.
In some embodiments, the cell voltage acquisition circuit is configured to acquire a voltage value of the battery cell.
In some embodiments, the battery current collection channel is configured to collect a signal output by a current sensor.
In some embodiments, the CPU chip is configured to store a program and the program CAN be refreshed through the high speed CAN interface.
From the above, the DCDC module for the storage battery system for the railway vehicle replaces a main loop output contactor, so that the impact of voltage and current fluctuation on the storage battery when a switch is closed is restrained, and the safety of the storage battery is greatly improved; the charging voltage output by the charger is adjusted by controlling the duty ratio of the IGBT switching tube, and charging is carried out according to the self characteristics of the storage battery, so that the occurrence of overcharge safety accidents is avoided; and finally, when a fault occurs, the DCDC module timely disconnects the isolation of the storage battery, so that the storage battery is further protected.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a rail vehicle battery system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings in combination with specific embodiments.
It should be noted that all expressions using "first" and "second" in the embodiments of the present application are used for distinguishing two entities with the same name but different names or different parameters, and it is to be understood that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present application, and the descriptions thereof in the following embodiments are omitted.
The rail vehicles comprise locomotives, motor cars, subway vehicles and the like, and the battery systems on the vehicles are matched with chargers. The traditional storage battery system is generally realized by controlling a contactor, when the storage battery system works normally, the contactor is controlled to be closed, at the moment, the storage battery supplies power to the outside, and a charger can charge the storage battery; when a serious fault occurs in the storage battery, the contactor is controlled to be disconnected, and the storage battery is isolated and protected. However, when the charger works to close the contactor, large current impact can be generated due to the capacitance characteristic of the battery system; when the inside breaks down and disconnects the contactor, if the contactor is in the heavy current output at the moment, the contactor is easy to generate arcing and sparking phenomena, and the contactor is burnt or adhered in serious conditions, so that the battery is further overcharged and damaged.
In view of the above, the present application aims to provide a battery management system that is safe and reliable and can protect a battery. In order to solve the problems, the DC/DC replaces a contactor, the duty ratio of an IGBT switch tube is controlled, the charging voltage output by a charger is adjusted, and the storage battery is isolated when the storage battery has an internal fault.
The present application is further described with reference to fig. 1, which is a schematic circuit diagram of a rail vehicle battery system according to an embodiment of the present application. The present application provides a rail vehicle battery system, as described in fig. 1, comprising:
a storage battery 4 configured to store electric energy when charged and supply power to the rail vehicle 5 when discharged; can convert chemical energy directly into electric energy, and can be recharged; the recharging is realized through reversible chemical reaction, the internal active substances are regenerated by using external electric energy during the charging, the electric energy is stored into chemical energy, and the chemical energy is converted into electric energy again for outputting when the discharging is needed; a battery pack composed of one or more cells; the skeleton can adopt stainless steel material, and inside module support piece adopts nylon and glass fiber material, and the module outside is wrapped up by insulating film cover, can adapt to effects such as water, dirt, insulation.
Further, in the present embodiment, the storage battery 4 may be a plurality of storage battery 4 groups divided into independent cases, and the storage battery 4 groups are connected in series.
Further, in the present embodiment, the battery 4 may be a nickel-metal hydride battery 4.
A charger 3 configured to charge the storage battery 4; the current automatically decreases along with the increase of the charging voltage of the storage battery 4 according to the charging characteristic curve of the storage battery 4; the pulse charging mode at the last stage of charging is combined, so that the charging effect is more ideal; the capacity balance principle is adopted to intelligently judge the electric quantity of the storage battery 4, the storage battery 4 is ensured to be sufficient, and the charging has the function of dynamic tracking and adjusting of charging parameters and the perfect protection function.
A DCDC module 2 configured to put the battery 4 and a rail vehicle 5 into communication when the battery 4 is discharged; when the storage battery 4 is charged, the charging voltage output by the charger 3 is adjusted to adapt to the self characteristics of the storage battery; and, in the event of a failure of the accumulator 4, open circuit to isolate the accumulator.
Further, in this embodiment, the DCDC module 2 includes an IGBT switching tube, the IGBT switching tube adjusts the input voltage and the input current of the battery by controlling the on/off ratio of the IGBT switching tube through a duty ratio, the IGBT switching tube is a composite fully-controlled voltage-driven power semiconductor device, and has the advantages of both high input impedance and low on-state voltage drop, and the driving power is small and the saturation voltage is reduced.
The monitoring module 1 is configured to monitor the state of the storage battery 4, obtain state information of the storage battery 4, upload the state information, and control the DCDC module 2 to adjust the charging voltage output by the charger 3.
Further, in the present embodiment, the monitoring module 1 includes one or more of the following: the single battery voltage acquisition circuit is configured to acquire the voltage value of the single storage battery 4, the single battery voltage acquisition circuit is provided with an analog signal input, a control signal input and an analog signal output, receives input voltage at a specified time, and keeps the voltage at an output end until the next sampling is started, and the single battery voltage acquisition circuit comprises: an analog switch, a holding capacitor and a non-inverting circuit with a unit gain of 1; a battery current collection channel configured to collect a signal output by the current sensor; temperature signal acquisition circuit gathers the resistance of 4 surperficial NTC of battery, and temperature signal acquisition circuit is connected with temperature transmitter, converts the temperature into standard current signal output, and temperature signal acquisition circuit is including: the thermal resistor, the connecting wire and the display instrument; the RS485 communication interface is configured to communicate with a display of the rail vehicle 5 and upload the state information, the information comprises voltage, current, temperature, SOC and fault information, and after the state information is displayed by the display, a security inspector can observe the state of the storage battery through the display, so that the maintenance of the security inspector is facilitated; the high-speed CAN interface is configured to be connected with a PC (personal computer), the PC CAN monitor the state information of the storage battery 4 on line, and the state information of the storage battery 4 CAN be shared through the PC to realize remote real-time monitoring; and the CPU chip is configured to store a program, the program CAN be refreshed through the high-speed CAN interface, and when a new demand exists, the new demand program is written into the CPU chip through the high-speed CAN interface, so that the function expansion and optimization are realized.
Further, in this embodiment, the monitoring module 1 further includes 2 PID controllers, which are respectively a voltage control outer loop and a current control inner loop, and perform PID control on both variables of the inductor current and the capacitor voltage.
Further, in this embodiment, the monitoring module 1 further includes a driving circuit for outputting a PWM driving signal, and preferably, the driving circuit may select a direct coupling type driving: each path of output PWM driving signal of the control chip controls the DCDC module 2 through an amplifying circuit composed of two triodes.
Further, in this embodiment, the monitoring module 1 adopts a voltage control mode, and during charging, the monitoring module 1 collects the output voltage of the charger 3, compares the output voltage with a target voltage, and outputs a PWM wave signal to adjust the charging voltage output by the charger 3.
Further, in the present embodiment, the monitoring module 1 has an independent housing, the housing is made of stainless steel, the protection level meets the requirement of IP54 level, and the monitoring module can adapt to extreme climatic conditions such as wind, sand, rain, snow, hail, and the like, and has strong corrosion resistance.
Further, in the present embodiment, one monitoring module 1 is provided for each battery 4.
Based on the above specific embodiment, referring to fig. 1, the work flow of the management system for the storage battery 4 for the rail vehicle 5 is as follows:
during charging, the monitoring module 1 collects the output voltage of the charger 3, compares the output voltage sample with a target voltage, outputs a PWM (pulse width modulation) wave signal to control the DCDC module 2, and performs PID (proportion integration differentiation) closed-loop control on the charging voltage so as to enable the charging voltage to meet the requirement of the storage battery 4 and also perform PID control on current so as to enable the charging current to meet the charging requirement of the storage battery 4 and avoid the impact of overlarge voltage and current on the storage battery 4; during discharging, the monitoring module 1 controls and controls the IGBT switch tube in the DCDC module 2 to be completely switched on so as to ensure that the storage battery 4 is communicated with the rail vehicle 5; when the storage battery 4 has a fault, the monitoring module 1 controls an IGBT switching tube in the DCDC module 2 to be switched off so as to isolate the storage battery 4.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the application. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the application, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the application is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the present application are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. A rail vehicle battery system, comprising:
a storage battery configured to store electric energy when charged and supply power to the rail vehicle when discharged;
a charger configured to charge the storage battery;
a DCDC module configured to communicate the battery with a rail vehicle when the battery is discharged; when the storage battery is charged, the charging voltage output by the charger is adjusted; and disconnecting the primary circuit to isolate the battery when the battery fails.
2. The rail vehicle battery system according to claim 1, further comprising:
and the monitoring module is configured to monitor the state of the storage battery, acquire state information, upload the state information and control the DCDC module to regulate the charging voltage output by the charger.
3. The rail vehicle battery system of claim 2, wherein the DCDC module comprises:
and the IGBT switching tube is configured to regulate the input voltage and the input current of the storage battery by controlling the on-off ratio through a duty ratio.
4. A rail vehicle battery system as claimed in claim 3, wherein the monitoring module is configured in particular to:
and collecting the output voltage of the charger, outputting PWM (pulse-width modulation) pulses according to the output voltage, and controlling the duty ratio of the IGBT switch tube to carry out PID (proportion integration differentiation) closed-loop control on the charging voltage.
5. The rail vehicle battery system of claim 4, wherein the monitoring module further comprises one or more of: the device comprises a single battery voltage acquisition circuit, a battery current acquisition channel, a temperature signal acquisition circuit, an RS485 communication interface, a high-speed CAN interface and a CPU chip.
6. The rail vehicle battery system as defined in claim 5, wherein the RS485 communication interface is configured to communicate with a rail vehicle display to upload the status information.
7. The rail vehicle battery system of claim 5, wherein the high-speed CAN interface is configured to interface with a PC.
8. The rail vehicle battery system of claim 5, wherein the cell voltage acquisition circuit is configured to acquire a voltage value of the battery cell.
9. The rail vehicle battery system of claim 5, wherein the battery current collection channel is configured to collect a signal output by a current sensor.
10. The rail vehicle battery system of claim 5, wherein the CPU chip is configured to store a program and the program is capable of being refreshed via the high-speed CAN interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910952182.5A CN112636404A (en) | 2019-10-09 | 2019-10-09 | Storage battery system for railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910952182.5A CN112636404A (en) | 2019-10-09 | 2019-10-09 | Storage battery system for railway vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN112636404A true CN112636404A (en) | 2021-04-09 |
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| CN201910952182.5A Pending CN112636404A (en) | 2019-10-09 | 2019-10-09 | Storage battery system for railway vehicle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008172857A (en) * | 2007-01-09 | 2008-07-24 | Kawasaki Heavy Ind Ltd | Charger for battery in railroad vehicle |
| CN103187764A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Electric automobile, power system and motor controller used for electric automobile |
| CN104253471A (en) * | 2013-06-28 | 2014-12-31 | 比亚迪股份有限公司 | Charging system and charging control method of electric vehicle |
| CN106532891A (en) * | 2017-01-11 | 2017-03-22 | 云南昆船智能装备有限公司 | Super-capacitor and storage battery hybrid energy storage and power supply and charging method |
| CN208931152U (en) * | 2018-10-18 | 2019-06-04 | 北京睿来电控科技有限公司 | Distributed bidirectional for electric car drives rechargeable electrical energy transformation system |
-
2019
- 2019-10-09 CN CN201910952182.5A patent/CN112636404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008172857A (en) * | 2007-01-09 | 2008-07-24 | Kawasaki Heavy Ind Ltd | Charger for battery in railroad vehicle |
| CN103187764A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Electric automobile, power system and motor controller used for electric automobile |
| CN104253471A (en) * | 2013-06-28 | 2014-12-31 | 比亚迪股份有限公司 | Charging system and charging control method of electric vehicle |
| CN106532891A (en) * | 2017-01-11 | 2017-03-22 | 云南昆船智能装备有限公司 | Super-capacitor and storage battery hybrid energy storage and power supply and charging method |
| CN208931152U (en) * | 2018-10-18 | 2019-06-04 | 北京睿来电控科技有限公司 | Distributed bidirectional for electric car drives rechargeable electrical energy transformation system |
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Application publication date: 20210409 |
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